the date Picker I have right now has the style like : mm/dd/YYYY and it displays at Textfield in "YYYY/MM/DD".
how can I change my code so that the datepicker shown is also changed to " YYYY/MM/DD".
Here is my code:
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] ;
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[NSDateComponents alloc] init] ;
[comps setYear:-10];
NSDate *maximumDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[comps setYear:-10];
NSDate *minimumDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
UIDatePicker *datePicker = [[UIDatePicker alloc]init];
datePicker.datePickerMode = UIDatePickerModeDate;
[datePicker setMaximumDate:maximumDate];
[datePicker setMinimumDate:minimumDate];
[datePicker addTarget:self action:#selector(datePickerValueChanged:) forControlEvents:UIControlEventValueChanged];
[self.Birthday setInputView:datePicker] ;
You can set the locale property of the DatePicker. The documentation says:
The default value is the current locale as returned by the currentLocale property of NSLocale, or the locale used by the date picker’s calendar. Locales encapsulate information about facets of a language or culture, such as the way dates are formatted.
It is generally considered poor form to force a user to select in a fashion not typical to their locale.
I think, you can't modify the UIDatePicker default style.
You can change to many formats after the date is picked by using NSDateFormatter
Example:
NSDate *today = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"MM/dd/yyyy hh:mma"];
NSString *dateString = [dateFormat stringFromDate:today];
NSLog(#"date: %#", dateString);
Related
Strange behavior in iOS 6.1 I have set the minimum date to current date for my date picker like this
NSDate *currentTime = [NSDate date];
[picker setMinimumDate:currentTime];
But when I run the app I am able to scroll to past date, though its not selected, picker doesn't jump back to current date. It's happening only with iOS 6.1 version and in rest picker is behaving normally.
I got the same issue as you and fixed it with only setting the date to the maximum date manually (in this case I set the limit to the current date):
- (IBAction)pickerValueChanged:(id)sender {
dispatch_async(dispatch_get_main_queue(), ^{
UIDatePicker *datePicker = (UIDatePicker *)sender;
if ([self.datePicker.date compare:[NSDate date]] == NSOrderedDescending) {
datePicker.date = [NSDate date];
}
});
}
This function is triggered when the date value from the date picker did change. you can set a maximum or minimum value here.
Try This code
NSCalendar *calendar = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease];
[comps setYear:30];
NSDate *maxDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[comps setYear:-30];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[datePicker setMaximumDate:maxDate];
[datePicker setMinimumDate:minDate];
You have to set min and max date like:
NSCalendar *calendar = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[datePicker setMinimumDate:minDate];
The property is an NSDate object or nil (the default), which means no maximum date. This property, along with the minimumDate property, lets you specify a valid date range. If the minimum date value is greater than the maximum date value, both properties are ignored. The minimum and maximum dates are also ignored in the countdown-timer mode (UIDatePickerModeCountDownTimer).
Try setting valid minimum and maximum date both.
It works for me.
I am working on a project where i need to set an alarm on 7 days before particular date the user has selected from date picker.
I used the following code to get the date from user
NSDateFormatter *df = [[NSDateFormatter alloc]init];
[df setDateStyle:NSDateFormatterFullStyle];
NSString *dateStr = [NSString stringWithFormat:#"%#",[df stringFromDate:datePickerObj.date]];
[df release];
Can any one please tell me how to get the date of 7 days previous to the selected date.
Thanks in advance
Use dateByAddingComponents:toDate:options:, like this:
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
components.day = -7;
NSDate *earlierDate = [calendar dateByAddingComponents:components
toDate:datePickerObj.date options:0];
I have 2 date pickers, each one deference from the ether (280 day)
the pickers change correctly, but mydatepicker.date when NSlog it or put it inUITextfield the date become date - 1 day or date + 1 day
here is my code :
the first picker:
int daysToAdd = -280;
// set up date components
NSDateComponents *components = [[[NSDateComponents alloc] init] autorelease];
[components setDay:daysToAdd];
// create a calendar
NSCalendar *addingdays = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDate *newDate = [addingdays dateByAddingComponents:components toDate:dueDatePickerView.date options:0];
lastPerPickerView.date = newDate;
NSLog(#"%#",newDate);
the second one:
int daysToAdd2 = 280;
// set up date components
NSDateComponents *components = [[[NSDateComponents alloc] init] autorelease];
[components setDay:daysToAdd2];
// create a calendar
NSCalendar *addingdays2 = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDate *newDate2 = [addingdays2 dateByAddingComponents:components toDate:lastPerPickerView.date options:0];
dueDatePickerView.date = newDate2;
NSLog(#"%#",newDate2);
if the date of 1st picker is 12-12-2012
the out put is 11-12-2012
in my code i gave them the properity of
lastPerPickerView.datePickerMode = UIDatePickerModeDate;
Try adding this lines to your code,
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"GMT+0:00"]];
or
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"GMT"]];
The output you are getting is correct logically. But if you want the output according to your requirement I think you should change value 280 to 279.
I am facing a weird problem with NSDate, when I try fetch a date from device, sometimes it shows previous month for some versions
Here is my chunk of code for reference
NSDate *date = [NSDate date];
NSDateFormatter *dateF = [[NSDateFormatter alloc]init];
[dateF setDateFormat:#" dd.MM.yyyy "];
NSString *selectedDate = [dateF stringFromDate:date];
Any inputs are appreciated, Thank you
To avoid later localizing problems you might use NSCalendar and its method components:fromDate:
Something like this:
NSCalendar * calendar = [NSCalendar currentCalendar];
NSDateComponents * components = [calendar components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit
fromDate:[NSDate date]];
NSString * stringDate = [NSString stringWithFormat:#"%d.%d.%d", components.day, components.month, components.year];
NSDate *today = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"hh:mma dd/MMM"];
NSString *dateString = [dateFormat stringFromDate:today];
NSLog(#"date: %#", dateString);
[dateFormat release];
This is an example by Apple so it looks like you have your upper-case / lower-case right
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd 'at' HH:mm"];
Are you sure your device's date is set right? Also have you tried setting the locale of the NSDateFormatter?
EDIT:
To address you question in comments: NSDate is a point in time irrespective of time zones, calendars and so so on. NSCalendar and NSDateFormatter allow you to convert this point in time into a representation that is correct in a given time zone, with a given calendar.
I have a date in UILabel(like 'Dec 14, 2010). This date i want to set as minimum date of my UIDatepicker. How can i do this please reply?
Thanks
Nishant
Convert your UILabel text in to date format using NSDateFormatter and put that value replacing "Date" in following example:
UIDatepicker *datePicker;
NSDate *Date=[NSDate date];
datePicker.minimumDate=Date;
You can use NSDateFormatter and use setDateFormat method for setting Date format.
[formatter setDateFormat:#"MMM dd,yyyy"];
NSDate *date = [formatter dateFromString:lblDate.text];
datePicker.minimumDate=date;
NSCalendar *calendar = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease];
[comps setYear:0];
NSDate *maxDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[comps setYear:-5];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[datePicker setMaximumDate:maxDate];
[datePicker setMinimumDate:minDate];
it showing five year date.......
See the minimum time from the current date to one month:
NSDate* currentTime = [NSDate date];
[datePicker setMinimumDate:[currentTime dateByAddingTimeInterval:43200]];//min time +12:00 for the current date
[datePicker setMaximumDate:[currentTime dateByAddingTimeInterval:2592000]]; // max day (+ 30 )